DS92LV8028 Quick Datasheet Snapshot: Key Specs & Pinout
The DS92LV8028 is an 8-channel, 10:1 LVDS serializer designed to collapse parallel LVDS lanes into a single high-speed serialized link for board-to-board and module interfaces. This summary provides a technical baseline for rapid evaluation and prototyping.
1 — Architecture & Typical Applications
— Core Function
The device serializes eight LVDS input channels into one serialized lane using a 10:1 ratio. It utilizes an internal PLL to align and serialize parallel data from multiple differential input pairs.
— System Placement
Commonly used in board-to-board video, camera link aggregation, and display interfaces. Designers place this serializer near the data source to reduce cable count and FPGA I/O requirements.
2 — Quick Specs Snapshot
| Parameter | Value / Action |
|---|---|
| Supply Voltage(s) | Consult datasheet for nominal/tolerance (e.g., 3.3V) |
| Per-Pair Data Rate | Refer to specific frequency range in datasheet |
| Serialized Lane Rate | 10x Input Rate (Verify max Gbps) |
| Jitter / Skew Limits | Refer to AC Electrical Specifications |
| Package | Pins | Max Pd | Mounting Notes |
|---|---|---|---|
| LQFP / TQFP | Check Datasheet | See Thermal Section | Follow land pattern & via stitching |
3 — Pinout & Signal Handling
— Functional Mapping
- LVDS Inputs: 8 pairs of differential inputs requiring precise impedance control.
- Serialized Output: High-speed differential pair for long-reach transmission.
- Control Pins: RESET, Mode select, and PLL reference clock inputs.
- Power/GND: Multiple VCC and GND pins for noise isolation.
— Critical Pins
Handle RESET and PLL reference clock inputs with care. Improper termination or noisy clock sources can prevent PLL lock. Follow datasheet guidance for pull-up/pull-down values on strap pins.
4 — Modes & Initialization
The DS92LV8028 typically supports initialization, normal data, and test/loopback modes. A reliable power-up sequence involves stabilizing supply rails, releasing reset, and monitoring the PLL lock indicator before data transmission.
5 — Design & Layout Checklist
- Impedance: Target 100Ω differential impedance for all high-speed pairs.
- Skew: Match channel trace lengths within specified datasheet tolerances.
- Decoupling: Place 0.1µF and 0.01µF caps as close to VCC pins as possible.
- Grounding: Use a continuous ground plane beneath all differential traces.
Summary
The DS92LV8028 serves as a robust 10:1 serializer for industrial high-speed links. Success depends on precise SI (Signal Integrity) practices, PLL clock stability, and strict adherence to the electrical timing limits defined in the official documentation.
FAQ
What are the recommended check items from the DS92LV8028 datasheet before first power-up?
Verify correct supply voltages and decoupling, confirm RESET and mode pins are held in the recommended states, lay out termination resistors as specified, and ensure PLL reference clock routing follows the layout notes. Use scope checkpoints for power stability.
How should designers approach the DS92LV8028 pinout when creating the PCB footprint?
Extract the exact pin numbers from the datasheet pin table, implement the recommended land pattern, provide thermal vias beneath exposed pads if specified, and keep high-speed LVDS traces short. Leave reserved pins unconnected unless instructed otherwise.
What quick tests confirm the serialized link is functioning correctly?
Confirm PLL lock status, inspect the serialized differential eye with a high-bandwidth probe, run loopback or pattern tests, and verify downstream deserializer lock. Recheck termination and polarity if the link fails.
What are the critical termination requirements for DS92LV8028 LVDS pairs?
Place 100Ω differential termination resistors near the inputs, ensure controlled impedance routing (typically 100Ω diff), and match channel trace lengths within the datasheet-specified skew tolerance to ensure data alignment.
